"Jay P Francis" > wrote in message
...
> They're from the New World and indigenous to Mexico.

Actually they are from Asia. Here is a bit from "foodrefrence.com".

Charlie

"DID YOU KNOW?
Radishes were first cultivated thousands of years ago in China, then in
Egypt and Greece. Radishes were so highly regarded in Greece that gold
replicas were made. The radish did not make its way to England until
approximately 1548. By 1629 they were being cultivated in Massachusetts."